What about taking a clip art image that you like and blowing it up to the size of the cake and using toothpicks poke the image onto the top of the cake for you to use as a guide when you ice it?
Or you could get the doll cake pan that you poke the doll into the top, get a Tink doll from TDS and ice the cake to look like a rock w/ piping gel as waves up the side and sprinkles for pixie dust Cross Tinks legs and sit her atop the rock.
hmmm, I'll keep thinking.
Cheryl